TestDriver: Remove unused local variable initialization

Templates/TestDriver.cxx.in

@@ -40,7 +40,7 @@ static const int NumTests =
 static char* lowercase(const char* string)
 {
   char *new_string, *p;
-  size_t stringSize = 0;
+  size_t stringSize;
 
   stringSize = CM_CAST(size_t, strlen(string) + 1);
   new_string = CM_CAST(char*, malloc(sizeof(char) * stringSize));