ggml : restore ggml_type_sizef() to aboid major version bump (ggml/1441)

ggml/include/ggml.h

@@ -733,6 +733,10 @@ extern "C" {
     GGML_API size_t  ggml_type_size(enum ggml_type type);             // size in bytes for all elements in a block
     GGML_API size_t  ggml_row_size (enum ggml_type type, int64_t ne); // size in bytes for all elements in a row
 
+    GGML_DEPRECATED(
+    GGML_API double ggml_type_sizef(enum ggml_type type), // ggml_type_size()/ggml_blck_size() as float
+    "use ggml_row_size() instead");
+
     GGML_API const char * ggml_type_name(enum ggml_type type);
     GGML_API const char * ggml_op_name  (enum ggml_op   op);
     GGML_API const char * ggml_op_symbol(enum ggml_op   op);

ggml/src/ggml.c

@@ -1294,6 +1294,12 @@ size_t ggml_row_size(enum ggml_type type, int64_t ne) {
     return ggml_type_size(type)*ne/ggml_blck_size(type);
 }
 
+double ggml_type_sizef(enum ggml_type type) {
+    assert(type >= 0);
+    assert(type < GGML_TYPE_COUNT);
+    return ((double)(type_traits[type].type_size))/type_traits[type].blck_size;
+}
+
 const char * ggml_type_name(enum ggml_type type) {
     assert(type >= 0);
     assert(type < GGML_TYPE_COUNT);