Mark variables modified in TRY block as volatile.

It's important that the values in these variables are maintained even after an exception is thrown, so they must be marked volatile.

Found while testing on the ppc64le architecture.

src/info/info.c

@@ -503,8 +503,8 @@ infoLoad(const String *error, InfoLoadCallback *callbackFunction, void *callback
     MEM_CONTEXT_TEMP_BEGIN()
     {
         unsigned int try = 0;
-        bool done = false;
-        bool loaded = false;
+        volatile bool done = false;                                 // Are all files tried? Must be preserved even on error.
+        volatile bool loaded = false;                               // Was a file loaded? Must be preserved even on error.
         const ErrorType *loadErrorType = NULL;
         String *loadErrorMessage = NULL;