paper min size set to 1 inch (previously 0.1 inch, very small indeed)

Avoid using magic numbers in file pcb_parser.cpp.
Fixes #11807
https://gitlab.com/kicad/code/kicad/issues/11807

include/page_info.h

@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2007-2013 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
  * Copyright (C) 2008-2013 Wayne Stambaugh <stambaughw@gmail.com>
- * Copyright (C) 2007-2020 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 2007-2022 KiCad Developers, see AUTHORS.txt for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -36,7 +36,7 @@
 #include <base_units.h>     // for IU_PER_MILS
 
 /// Min and max page sizes for clamping, in mils.
-#define MIN_PAGE_SIZE_MILS          100
+#define MIN_PAGE_SIZE_MILS          1000
 #define MAX_PAGE_SIZE_PCBNEW_MILS   48000
 #define MAX_PAGE_SIZE_EESCHEMA_MILS 120000
 

pcbnew/plugins/kicad/pcb_parser.cpp

@@ -1196,18 +1196,20 @@ void PCB_PARSER::parsePAGE_INFO()
     {
         double width = parseDouble( "width" );      // width in mm
 
+        const double Mils2mm = 0.0254;
+
         // Perform some controls to avoid crashes if the size is edited by hands
-        if( width < 100.0 )
-            width = 100.0;
-        else if( width > 1200.0 )
-            width = 1200.0;
+        if( width < MIN_PAGE_SIZE_MILS*Mils2mm )
+            width = MIN_PAGE_SIZE_MILS*Mils2mm;
+        else if( width > MAX_PAGE_SIZE_PCBNEW_MILS*Mils2mm )
+            width = MAX_PAGE_SIZE_PCBNEW_MILS*Mils2mm;
 
         double height = parseDouble( "height" );    // height in mm
 
-        if( height < 100.0 )
-            height = 100.0;
-        else if( height > 1200.0 )
-            height = 1200.0;
+        if( height < MIN_PAGE_SIZE_MILS*Mils2mm )
+            height = MIN_PAGE_SIZE_MILS*Mils2mm;
+        else if( height > MAX_PAGE_SIZE_PCBNEW_MILS*Mils2mm )
+            height = MAX_PAGE_SIZE_PCBNEW_MILS*Mils2mm;
 
         pageInfo.SetWidthMils( Mm2mils( width ) );
         pageInfo.SetHeightMils( Mm2mils( height ) );