disable unaligned load/store for g++

Author: Matthias Güdemann

src/miniz/miniz.h

@@ -224,7 +224,7 @@
 #define MINIZ_LITTLE_ENDIAN 1
 #endif
 
-#if MINIZ_X86_OR_X64_CPU
+#if defined(MINIZ_X86_OR_X64_CPU) && !defined(__GNUG__)
 /* Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES to 1 on CPU's that permit efficient integer loads and stores from unaligned addresses. */
 #define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 1
 #endif