Fix some level 1 MSVC compiler warnings on x86

See GH-8479.

Author: mvorisek

ext/opcache/jit/zend_jit_x86.dasc

@@ -2925,7 +2925,7 @@ static int zend_jit_setup(void)
 	/* To find offset of "_tsrm_ls_cache" in TLS segment we perform a linear scan of local TLS memory */
 	/* Probably, it might be better solution */
 	do {
-		void ***tls_mem = ((void***)__readfsdword(0x2c))[_tls_index];
+		void ***tls_mem = ((void**)__readfsdword(0x2c))[_tls_index];
 		void *val = _tsrm_ls_cache;
 		size_t offset = 0;
 		size_t size = (char*)&_tls_end - (char*)&_tls_start;

main/streams/plain_wrapper.c

@@ -879,7 +879,11 @@ static int php_stdiop_set_option(php_stream *stream, int option, int value, void
 							size_t rounded_offset = (range->offset / gran) * gran;
 							delta = range->offset - rounded_offset;
 							loffs = (DWORD)rounded_offset;
+#ifdef _WIN64
 							hoffs = (DWORD)(rounded_offset >> 32);
+#else
+							hoffs = 0;
+#endif
 						}
 
 						/* MapViewOfFile()ing zero bytes would map to the end of the file; match *nix behavior instead */