Use strdup on gradient colours as well

Fixes bug introduced in #310

config.c

@@ -346,11 +346,18 @@ bool validate_config(char supportedInput[255], void *params, void *err) {
 
 bool load_colors(struct config_params *p, dictionary *ini, void *err) {
     struct error_s *error = (struct error_s *)err;
-    p->color = (char *)iniparser_getstring(ini, "color:foreground", "default");
-    p->bcolor = (char *)iniparser_getstring(ini, "color:background", "default");
+
+    free(p->color);
+    free(p->bcolor);
+
+    p->color = strdup(iniparser_getstring(ini, "color:foreground", "default"));
+    p->bcolor = strdup(iniparser_getstring(ini, "color:background", "default"));
 
     p->gradient = iniparser_getint(ini, "color:gradient", 0);
     if (p->gradient) {
+        for (int i = 0; i < p->gradient_count; ++i) {
+            free(p->gradient_colors[i]);
+        }
         p->gradient_count = iniparser_getint(ini, "color:gradient_count", 2);
         if (p->gradient_count < 2) {
             write_errorf(error, "\nAtleast two colors must be given as gradient!\n");
@@ -364,7 +371,7 @@ bool load_colors(struct config_params *p, dictionary *ini, void *err) {
         for (int i = 0; i < p->gradient_count; i++) {
             char ini_config[32];
             sprintf(ini_config, "color:gradient_color_%d", (i + 1));
-            p->gradient_colors[i] = (char *)iniparser_getstring(ini, ini_config, NULL);
+            p->gradient_colors[i] = strdup(iniparser_getstring(ini, ini_config, NULL));
             if (p->gradient_colors[i] == NULL) {
                 write_errorf(error, "\nGradient color not specified : gradient_color_%d\n",
                              (i + 1));