clean some dead code (with static analysis help)

Zend/zend_constants.c

@@ -379,7 +379,6 @@ ZEND_API int zend_get_constant_ex(const char *name, uint name_len, zval *result,
 					name = constant_name;
 					name_len = const_name_len;
 					efree(class_name);
-					retval = 1;
 					return zend_get_constant(name, name_len, result TSRMLS_CC);
 				}
 				if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {

ext/iconv/iconv.c

@@ -1295,7 +1295,6 @@ static php_iconv_err_t _php_iconv_mime_encode(smart_str *pretval, const char *fn
 						char_cnt -= 3;
 					}
 				}
-				prev_in_left = in_left;
 
 				smart_str_appendl(pretval, "?=", sizeof("?=") - 1);
 				char_cnt -= 2;

ext/pcre/php_pcre.c

@@ -894,7 +894,6 @@ static int preg_do_eval(char *eval_str, int eval_str_len, char *subject,
 				} else {
 					esc_match = "";
 					esc_match_len = 0;
-					match_len = 0;
 				}
 				smart_str_appendl(&code, esc_match, esc_match_len);
 

ext/standard/array.c

@@ -3347,7 +3347,6 @@ static void php_array_diff(INTERNAL_FUNCTION_PARAMETERS, int behavior, int data_
 	} else if (behavior & DIFF_ASSOC) { /* triggered also if DIFF_KEY */
 		/* DIFF_KEY is subset of DIFF_ASSOC. When having the former
 		 * no comparison of the data is done (part of DIFF_ASSOC) */
-		diff_key_compare_func = php_array_key_compare;
 
 		if (data_compare_type == DIFF_COMP_DATA_INTERNAL && key_compare_type == DIFF_COMP_KEY_INTERNAL) {
 			/* array_diff_assoc() or array_diff_key() */

ext/standard/base64.c

@@ -190,7 +190,7 @@ PHPAPI unsigned char *php_base64_decode_ex(const unsigned char *str, int length,
 		case 2:
 			k++;
 		case 3:
-			result[k++] = 0;
+			result[k] = 0;
 		}
 	}
 	if(ret_length) {

ext/standard/image.c

@@ -653,7 +653,7 @@ static struct gfxinfo *php_handle_jpc(php_stream * stream TSRMLS_DC)
 	}
 
 	/* Collect bit depth info */
-	highest_bit_depth = bit_depth = 0;
+	highest_bit_depth = 0;
 	for (i = 0; i < result->channels; i++) {
 		bit_depth = php_stream_getc(stream); /* Ssiz[i] */
 		bit_depth++;

ext/standard/versioning.c

@@ -45,7 +45,7 @@ php_canonicalize_version(const char *version)
     p = version;
     q = buf;
     *q++ = lp = *p++;
-    lq = '\0';
+
     while (*p) {
 /*  s/[-_+]/./g;
  *  s/([^\d\.])([^\D\.])/$1.$2/g;
@@ -55,22 +55,22 @@ php_canonicalize_version(const char *version)
 #define isndig(x) (!isdigit(x)&&(x)!='.')
 #define isspecialver(x) ((x)=='-'||(x)=='_'||(x)=='+')
 
-        lq = *(q - 1);
+		lq = *(q - 1);
 		if (isspecialver(*p)) {
 			if (lq != '.') {
-				lq = *q++ = '.';
+				*q++ = '.';
 			}
 		} else if ((isndig(lp) && isdig(*p)) || (isdig(lp) && isndig(*p))) {
 			if (lq != '.') {
 				*q++ = '.';
 			}
-			lq = *q++ = *p;
+			*q++ = *p;
 		} else if (!isalnum(*p)) {
 			if (lq != '.') {
-				lq = *q++ = '.';
+				*q++ = '.';
 			}
 		} else {
-			lq = *q++ = *p;
+			*q++ = *p;
 		}
 		lp = *p++;
     }

main/rfc1867.c

@@ -203,7 +203,8 @@ static void normalize_protected_variable(char *varname TSRMLS_DC)
 			index = NULL;
 		}	
 	}
-	*s++='\0';
+
+	*s = '\0';
 }
 
 
@@ -610,7 +611,7 @@ static char *substring_conf(char *start, int len, char quote TSRMLS_DC)
 		}
 	}
 
-	*resp++ = '\0';
+	*resp = '\0';
 	return result;
 }
 

main/streams/glob_wrapper.c

@@ -209,7 +209,7 @@ static php_stream *php_glob_stream_opener(php_stream_wrapper *wrapper, char *pat
 		int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC)
 {
 	glob_s_t *pglob;
-	int ret, path_len;
+	int ret;
 	char *tmp, *pos;
 
 	if (((options & STREAM_DISABLE_OPEN_BASEDIR) == 0) && php_check_open_basedir(path TSRMLS_CC)) {
@@ -218,12 +218,9 @@ static php_stream *php_glob_stream_opener(php_stream_wrapper *wrapper, char *pat
 
 	if (!strncmp(path, "glob://", sizeof("glob://")-1)) {
 		path += sizeof("glob://")-1;
-		path_len = strlen(path);
 		if (opened_path) {
-			*opened_path = estrndup(path, path_len);
+			*opened_path = estrdup(path);
 		}
-	} else {
-		path_len = strlen(path);
 	}
 
 	pglob = ecalloc(sizeof(*pglob), 1);