Address some compiler warnings.

- Add explicit casts from long to int.
- Comment out method argument names that are unused.
- Always initialize a boolean variable before it's read.

glslang/Include/InfoSink.h

@@ -74,7 +74,7 @@ public:
     TInfoSinkBase& operator<<(const char* s)           { append(s); return *this; }
     TInfoSinkBase& operator<<(int n)                   { append(String(n)); return *this; }
     TInfoSinkBase& operator<<(unsigned int n)          { append(String(n)); return *this; }
-    TInfoSinkBase& operator<<(long unsigned int n)     { append(String(n)); return *this; }
+    TInfoSinkBase& operator<<(long unsigned int n)     { append(String((int)n)); return *this; }
     TInfoSinkBase& operator<<(float n)                 { const int size = 40; char buf[size]; 
                                                          snprintf(buf, size, (fabs(n) > 1e-8 && fabs(n) < 1e8) || n == 0.0f ? "%f" : "%g", n);
                                                          append(buf);