Fix another warnings that are triggered in another random combinaison of compiler settings

m-core.h

@@ -1873,7 +1873,7 @@ M_PARSE_DEFAULT_TYPE_DEF(m_core_parse_ldouble, long double, strtold, )
 #endif
 
 #define M_HASH_DECL(hash)   size_t hash = M_HASH_INIT ^ M_HASH_SEED
-#define M_HASH_UP(hash,h)   do { hash = M_HASH_CALC(hash, (h)); } while (0)
+#define M_HASH_UP(hash,h)   do { hash = (size_t) M_HASH_CALC(hash, (h)); } while (0)
 #define M_HASH_FINAL(hash)  ( (hash) >> (sizeof(size_t)*CHAR_BIT/2) | (hash) )
 
 /* Safe, efficient, and portable Rotate:

m-dict.h

@@ -1856,7 +1856,7 @@ typedef enum {
     DICTI_OA_CONTRACT(dict);						\
     size_t size;							\
     /* Get the size which will allow to fit this capacity */		\
-    size = m_core_roundpow2 ((uint64_t) ((double) capacity * (1.0 / coeff_up))); \
+    size = (size_t) m_core_roundpow2 ((uint64_t) ((double) capacity * (1.0 / coeff_up))); \
     /* Test for overflow of the computation */                          \
     if (M_UNLIKELY (size < capacity)) {					\
       M_MEMORY_FULL((size_t)-1);					\