Add GCC 4.6 version restriction for "#pragma GCC diagnostic".

Author: mildas

src/OVAL/probes/SEAP/MurmurHash3.c

@@ -127,6 +127,7 @@ void MurmurHash3_x86_32 ( const void * key, int len,
 
   uint32_t k1 = 0;
 
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
   switch(len & 3)
@@ -137,6 +138,7 @@ void MurmurHash3_x86_32 ( const void * key, int len,
           k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
   };
 #pragma GCC diagnostic pop
+#endif
 
   //----------
   // finalization
@@ -205,6 +207,7 @@ void MurmurHash3_x86_128 ( const void * key, const int len,
   uint32_t k3 = 0;
   uint32_t k4 = 0;
 
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
   switch(len & 15)
@@ -233,6 +236,7 @@ void MurmurHash3_x86_128 ( const void * key, const int len,
            k1 *= c1; k1  = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
   };
 #pragma GCC diagnostic pop
+#endif
 
   //----------
   // finalization
@@ -297,6 +301,7 @@ void MurmurHash3_x64_128 ( const void * key, const int len,
   uint64_t k1 = 0;
   uint64_t k2 = 0;
 
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
   switch(len & 15)
@@ -321,6 +326,7 @@ void MurmurHash3_x64_128 ( const void * key, const int len,
            k1 *= c1; k1  = ROTL64(k1,31); k1 *= c2; h1 ^= k1;
   };
 #pragma GCC diagnostic pop
+#endif
 
   //----------
   // finalization