Update to include int32 hashmap keytype

Update to stdlib_hashmap_wrappers.f90 that includes support for int32 vector key types.

src/stdlib_hashmap_wrappers.f90

@@ -101,7 +101,8 @@ end function hasher_fun
 
         module procedure set_char_key,   &
                          set_int8_key,   &
-                         set_other
+                         set_other,      &
+                         set_int32_key
 
     end interface set
 
@@ -308,6 +309,21 @@ subroutine set_other( other, value )
     end subroutine set_other
 
 
+    subroutine set_int32_key( key, value )
+        !! Version: Experimental
+        !!
+        !! Sets the contents of the key from an INTEGER(INT8) vector
+        !! Arguments:
+        !!     key   - the output key
+        !!     value - the input INTEGER(INT32) vector
+                type(key_type), intent(out) :: key
+                integer(int32), intent(in)   :: value(:)
+
+                key % value = transfer(value, key % value)
+
+        end subroutine set_int32_key
+
+
     subroutine set_int8_key( key, value )
 !! Version: Experimental
 !!