Diff of /filter.h [dcc88f] .. [349c3d] Maximize Restore

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--- a/filter.h
+++ b/filter.h
@@ -556,9 +556,9 @@
 int 	Progress( int command, char* argument );	// Progress Reporting 
 void PT_setInfoDlgFcn(int (*ptr)(int, char *));            // set custom info callback
 int 	infoDlg ( int command, char* argument );	// Display info: same argumenmts as progress
-void PT_setErrorFcn( void (*ptr)( char* , va_list va));         // set custom error function
-void  	PrintError( char* fmt, ...);				// Error Reporting
-void dieWithError(char*fmt, ...);
+void PT_setErrorFcn( void (*ptr)( const char* , va_list va));         // set custom error function
+void  	PrintError( const char* fmt, ...);				// Error Reporting
+void dieWithError(const char*fmt, ...);
 
 int 	ccommand( char ***argvPtr);					// Shell for standalone programs
 
@@ -1033,3 +1033,4 @@
 // number of different temporary files
 #define MAX_TEMP_TRY    1000000
 
+