Build: fix warnings. Fixes #1653.
diff --git a/SPIRV/GlslangToSpv.cpp b/SPIRV/GlslangToSpv.cpp
old mode 100644
new mode 100755
index c7cab84..9bf3704
--- a/SPIRV/GlslangToSpv.cpp
+++ b/SPIRV/GlslangToSpv.cpp
@@ -3232,7 +3232,7 @@
     // Decorate it
     decorateStructType(type, glslangMembers, explicitLayout, qualifier, spvType);
 
-    for (int i = 0; i < deferredForwardPointers.size(); ++i) {
+    for (int i = 0; i < (int)deferredForwardPointers.size(); ++i) {
         auto it = deferredForwardPointers[i];
         convertGlslangToSpvType(*it.first, explicitLayout, it.second, false);
     }