Silence spurious warnings

None of these are actual bugs as far as I can tell.

src/3d/particle.c

@@ -943,7 +943,7 @@ void particle_object_calc_local_transform(struct RE_instance *inst, struct parti
 	struct pae_object *pae_obj = po->pae_obj;
 	float t = glm_percent(pi->begin_frame, pi->end_frame, frame);
 
-	vec3 pos, up_vector;
+	vec3 pos = {0}, up_vector;
 	calc_pos_and_up_vector(po, pi, t, pos, up_vector);
 
 	float rel_frame = frame - pi->begin_frame;

src/audio_meta.c

@@ -31,7 +31,7 @@ static struct bgi bgi_data[BGI_MAX];
 static char *bgi_gets(char *buf, int n, FILE *fp)
 {
 	char *s = buf;
-	int c;
+	int c = EOF;
 	while (--n > 0 && (c = fgetc(fp)) != EOF) {
 		c = c >> 4 | (c & 0xf) << 4;  // decrypt
 		*s++ = c;

src/ffi.c

@@ -395,7 +395,10 @@ void hll_call(int libno, int fno)
 		stack_push(slot);
 		break;
 	case AIN_BOOL:
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstrict-aliasing"
 		stack_push(*(bool*)&r);
+#pragma GCC diagnostic pop
 		break;
 	default:
 		stack_push(r);

src/hll/vmArray.c

@@ -15,6 +15,7 @@
  */
 
 #include <stdint.h>
+#include <limits.h>
 
 #include "hll.h"
 #include "vm/page.h"
@@ -408,7 +409,7 @@ static int vmArray_GrepLowOrder(struct page *s_array, int index, struct page **d
 	if (index < 0)
 		VM_ERROR("not implemented");
 
-	int min_index = -1, min_value;
+	int min_index = -1, min_value = INT_MAX;
 	for (int i = index; i < s_array->nr_vars; i++) {
 		if (d_array->values[i].i)
 			continue;
@@ -434,7 +435,7 @@ static int vmArray_GrepHighOrder(struct page *s_array, int index, struct page **
 	if (index < 0)
 		VM_ERROR("not implemented");
 
-	int max_index = -1, max_value;
+	int max_index = -1, max_value = INT_MIN;
 	for (int i = index; i < s_array->nr_vars; i++) {
 		if (d_array->values[i].i)
 			continue;

src/resume.c

@@ -417,6 +417,7 @@ int vm_save_image(const char *key, const char *path)
 	case SAVE_FORMAT_JSON:
 		return save_json_image(key, path);
 	}
+	return 0;
 }
 
 #define _invalid_save_data(file, func, line, fmt, ...)	\
@@ -1028,4 +1029,5 @@ int vm_write_image_comments(const char *key, const char *path, struct page *comm
 	case SAVE_FORMAT_JSON:
 		return write_json_image_comments(key, path, comments);
 	}
+	return 0;
 }