fixed uninitialized variable warning

Modified: trunk/reactos/tools/rbuild/backend/mingw/mingw.cpp

--- trunk/reactos/tools/rbuild/backend/mingw/mingw.cpp	2005-09-22 20:36:07 UTC (rev 17986)
+++ trunk/reactos/tools/rbuild/backend/mingw/mingw.cpp	2005-09-22 20:44:10 UTC (rev 17987)
@@ -854,7 +854,7 @@

 	
 	char separators[] = " ";
 	char *token;

-	char *prevtoken;

+	char *prevtoken = NULL;

 	
 	token = strtok ( buffer, separators );
 	while ( token != NULL )