added free_alphabet function; this function used for free alphabet. (#1805)

src/coco.c

@@ -374,10 +374,9 @@ void test_coco(char *cfgfile, char *weightfile, char *filename, float thresh)
         show_image(im, "predictions");
         free_image(im);
         free_image(sized);
-
+        free_alphabet(alphabet);
         wait_until_press_key_cv();
         destroy_all_windows_cv();
-
         if (filename) break;
     }
     free(boxes);

src/demo.c

@@ -413,14 +413,7 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
 
     free_ptrs((void **)names, net.layers[net.n - 1].classes);
 
-    const int nsize = 8;
+    free_alphabet(alphabet);
-    for (j = 0; j < nsize; ++j) {
-        for (i = 32; i < 127; ++i) {
-            free_image(alphabet[j][i]);
-        }
-        free(alphabet[j]);
-    }
-    free(alphabet);
     free_network(net);
     //cudaProfilerStop();
 }

src/detector.c

@@ -1778,17 +1778,7 @@ void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filenam
     free_ptrs((void**)names, net.layers[net.n - 1].classes);
     free_list_contents_kvp(options);
     free_list(options);
-
+    free_alphabet(alphabet);
-    int i;
-    const int nsize = 8;
-    for (j = 0; j < nsize; ++j) {
-        for (i = 32; i < 127; ++i) {
-            free_image(alphabet[j][i]);
-        }
-        free(alphabet[j]);
-    }
-    free(alphabet);
-
     free_network(net);
 }
 

src/image.c

@@ -280,6 +280,19 @@ image **load_alphabet()
     return alphabets;
 }
 
+void free_alphabet(image **alphabet)
+{
+    int i, j;
+    const int nsize = 8;
+    for (j = 0; j < nsize; ++j) {
+        for (i = 32; i < 127; ++i) {
+            free_image(alphabet[j][i]);
+        }
+        free(alphabet[j]);
+    }
+    free(alphabet);
+}
+
 
 
 // Creates array of detections with prob > thresh and fills best_class for them

src/image.h

@@ -88,6 +88,7 @@ image load_image(char *filename, int w, int h, int c);
 image load_image_stb_resize(char *filename, int w, int h, int c);
 //LIB_API image load_image_color(char *filename, int w, int h);
 image **load_alphabet();
+void free_alphabet(image **alphabet);
 
 //float get_pixel(image m, int x, int y, int c);
 //float get_pixel_extend(image m, int x, int y, int c);

src/yolo.c

@@ -328,11 +328,11 @@ void test_yolo(char *cfgfile, char *weightfile, char *filename, float thresh)
 
         free_image(im);
         free_image(sized);
-
+        free_alphabet(alphabet);
         wait_until_press_key_cv();
         destroy_all_windows_cv();
 
-        if (filename) break;
+      if (filename) break;
     }
     free(boxes);
     for(j = 0; j < l.side*l.side*l.n; ++j) {