Declare inline function strIsEqual() as static.

src/cdi_int.h

@@ -41,7 +41,7 @@ char *strdup(const char *s);
 char *strToLower(char *str);
 bool strStartsWith(const char *vstr, const char *cstr);
 
-inline bool
+static inline bool
 strIsEqual(const char *x, const char *y) 
 {
   return (*x == *y) && strcmp(x, y) == 0;