Bugfix : 'msys' has to be lowercase

tools/source_icons/script/svg2png.bash

@@ -48,7 +48,7 @@ do
     fi
 
     echo "#! /bin/bash" > $DIR_TMP/$FILE_NAME.bash
-    if [[ $OSTYPE == MSYS ]]; then
+    if [[ $OSTYPE == msys ]]; then
         awk -v s="$SVG" -v d="$DIR_OUT"  -F, '{print "\"/c/Program Files (x86)/Inkscape/inkscape.exe\" " s " --export-png=" d "/" $1 " -" $2}' $DIR_IN/$FILE >> $DIR_TMP/$FILE_NAME.bash
     else
         awk -v s="$SVG" -v d="$DIR_OUT"  -F, '{print "inkscape " s " --export-png=" d "/" $1 " -" $2}' $DIR_IN/$FILE >> $DIR_TMP/$FILE_NAME.bash