Description: Fix error related to char signedness
Author: Peter Michael Green <plugwash@debian.org>

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--- mysql-workbench-6.3.4+dfsg.orig/library/sql.parser/source/ctype-utf8.cpp
+++ mysql-workbench-6.3.4+dfsg/library/sql.parser/source/ctype-utf8.cpp
@@ -3869,7 +3869,7 @@ static uint16 uni_FF20_FF5F[64]=
 
 static int hexlo(int x)
 {
-  static char hex_lo_digit[256]=
+  static signed char hex_lo_digit[256]=
   {
     -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* ................ */
     -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* ................ */
